Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2009
Abstract
No abstract has been registered
Abstract
This paper reports a study on soil development in loamy marine sediments on both sides of the Oslofjord (Vestfold, Ostfold). This region has been subject to steady glacio-isostatic uplift during the whole Holocene. Hence, land surface age continuously increases from the coast inland. Several sea level curves, based on radiocarbon datings, enable estimation of land surface age for all locations. Clay illuviation starts in less than 1650 years. E horizons become lighter with age, but their lower boundary stays around 40 cm for more than 10 000 years. Albeluvic tongues develop between 4600 and 6200 years. Initially, they form along intersections of cracks. As preferential flow and leaching along the cracks continues, the tongues increase in length and width, progressively consuming the prisms between the cracks in the upper Bt horizon. The Fe-d/Fe-t ratios (weighted means of the upper meter) show a clear linear increase with soil age and may be used for "pedo-dating", i.e. for estimating the ages of non-dated land surfaces covered with similar sediments. In contrast, the logarithmic decrease of base saturation and pH, with rapid changes in the first time but only very slight changes between 2000 and 10 000 years, makes these parameters unsuitable for "pedo-dating". (c) 2008 Elsevier Ltd and INQUA. All rights reserved.
Book review – Nordic Landscapes: Region and Belonging on the Northern Edge of Europe
Sebastian Eiter
Authors
Sebastian EiterAbstract
No abstract has been registered
Authors
Wenche DramstadAbstract
No abstract has been registered
Authors
Bolette Bele Hanne Sickel Tor Lunnan Ann Norderhaug Marianne Østerlie Roger K. Abrahamsen Liv Sigrid Nilsen Mikael OhlsonAbstract
No abstract has been registered
2008
Abstract
The coastal areas of SE Norway provide suitable conditions for studying soil development with time, because unweathered land surfaces have continuously been raised above sea level by glacio-isostatic uplift since the termination of the last ice age. We investigated Podzol development in a chronosequence of six soils on sandy beach deposits with ages ranging from 2,300 to 9,650 y at the W coast of the Oslofjord. The climate in this area is rather mild with a mean annual temperature of 6 degrees C and an annual precipitation of 975mm (Sandefjord). The youngest soil showed no evidence of pocizolization, while slight lightening of the A horizon of the second soil (3,800 years) indicated initial leaching of organic matter (OM). In the 4,300 y-old soil also Fe and humus accumulation in the B horizon were perceptible, but only the 6,600 y-old and older soils exhibited spodic horizons. Accumulation of OM in the A horizons reached a steady state in <2,300 y, while in the B horizons OM accumulated at increasing rates. pH dropped from 6.6 (H2O)/5-9 (KCI) in the recent beach sand to 4.5 (H2O)/3.8 (KCl) within approx. 4,500 y (pH(H2O))/2,500 y (pH(KCl)) and stayed constant thereafter, which was attributed to sesquioxide buffering. Base saturation showed an exponential decrease with time. Progressive weathering was reflected by increasing Fe-d and Al-d contents, and proceeding podzolization by increasing amounts of pyrophophate- and oxalate-soluble Fe and Al with soil age. These increases could be best described for most Fe and Al fractions by exponential models. Only the increasing amounts of Fe-p could be better described by a power function and those of Fe-o by a linear model.
Abstract
In this project plant and vegetation preferences of two Norwegian dairy cattle breeds with different selection history were studied. The Norwegian dairy breed Blacksided Trønder and Nordland Cattle (STN) has never been selected efficiently for higher milk production. The other breed, however, the Norwegian Red (NR), has mainly been selected for this. Two herds both consisting of STN and NR cows, were studied. To examine the animals\" plant preferences, faeces samples were collected and analysed for plant fragments. Vegetation maps were also used to find possible differences in grazing preferences. Breed differences with regard to recorded plant fragments in the faeces samples were significant for Nardus stricta, a species characteristic for nutrient poor but mostly species rich vegetation types in the studied areas, vegetation types of high importance for the biodiversity especially in one of the areas. STN had the highest share of Nardus stricta. Altogether the results of the study indicate that a higher producing cattle breed might prefer to graze more nutrient rich vegetation areas compared to a lower yielding cattle breed, when grazing less nutrient and base rich - but species rich grasslands.
Abstract
No abstract has been registered
Abstract
No abstract has been registered
Abstract
No abstract has been registered